Tagged Questions
3
votes
1answer
131 views
Why 5-50x focal length for autofocus micro-adjustment?
When we do an AutoFocus Micro Adjustment session, the general opinion is to set the focusing target at 25 x focal length (or somewhere in the range of 5-50 x focal length).
Why is so? What happens if ...
8
votes
1answer
177 views
How do repair shops fix focus shifts on bodies lacking focus microadjustment feature?
For camera bodies without autofocus microadjustment capability, how do repair shops calibrate a specific body and a lens combination suffering from the focus shifts (back and/or front focusing)?
3
votes
1answer
95 views
What factors influence whether a lens and camera combination front or back focus?
I know that sometimes a lens/body combo needs to be micro-adjusted to attain ideal focusing behavior, and that this is usually because of sample variation, but which parts of the lens and/or body are ...
2
votes
1answer
310 views
Problem with TTL autofocus on Canon 450d - is there a way to adjust?
I have Canon EOS 450D, and it seems, that camera have problem with autofocusing, when i'm looking through optical viewfinder. If I switch camera to liveview - autofocus works correctly, but slow.
The ...
5
votes
1answer
258 views
Which offers better results: FoCal or LensAlign Pro?
I am in need of microadjusting my autofocus for a couple of my lenses with my Canon 7D. Namely, I need to adjust the 100-400 L lens, which seems to consistently AF a bit softer than I've seen from ...
3
votes
3answers
1k views
Which lenses typically don't focus properly on the Canon 60D?
I currently have the 18-200mm kit lens for my canon 60D. I am thinking of getting the 10-22mm wide angle lens as a second lens. So far with my kit lens I havent experienced any focusing problems or ...
7
votes
1answer
4k views
Can I fine tune the autofocus on my Canon 60D to be more accurate?
I noticed that some of my lenses auto-focus more accurately then others. (Assume perfect light conditions and fast shutter speed) Zooming-in on say the center focus point (if only the center focus ...
42
votes
4answers
9k views
What is the best way to micro-adjust a lens?
I have a Canon 7D with a 50mm f/1.4 lens, and I think the auto-focus of the lens is off. How can I test and adjust this reliably?
Will this approach work with all of my lenses? If I had a different ...
